Define various variables to be readonly.

NetTally/Quest.cs

@@ -11,7 +11,7 @@ namespace NetTally
     /// </summary>
     public class Quest : IQuest, INotifyPropertyChanged
     {
-        static Regex urlRegex = new Regex(@"^(http://forums.sufficientvelocity.com/threads/)?(?<questName>[^/]+)(/.*)?");
+        static readonly Regex urlRegex = new Regex(@"^(http://forums.sufficientvelocity.com/threads/)?(?<questName>[^/]+)(/.*)?");
 
         /// <summary>
         /// Empty constructor for XML serialization.

NetTally/Quests.cs

@@ -9,7 +9,7 @@ namespace NetTally
 {
     public class Quests : IQuests, INotifyPropertyChanged
     {
-        static List<IQuest> questList = new List<IQuest>();
+        static readonly List<IQuest> questList = new List<IQuest>();
         IQuest currentQuest;
 
         /// <summary>

NetTally/VoteCounter.cs

@@ -52,23 +52,23 @@ private void SetupFormattingRegexes()
         string threadAuthor = string.Empty;
 
         // A post with ##### at the start of one of the lines is a posting of tally results.  Don't read it.
-        Regex tallyRegex = new Regex(@"^(\[/?[ibu]\]|\[color[^]]+\])*#####", RegexOptions.Multiline);
+        readonly Regex tallyRegex = new Regex(@"^(\[/?[ibu]\]|\[color[^]]+\])*#####", RegexOptions.Multiline);
         // A valid vote line must start with [x] or -[x] (with any number of dashes).  It must be at the start of the line.
-        Regex voteRegex = new Regex(@"^(\s|\[/?[ibu]\]|\[color[^]]+\])*-*\[[xX]\].*", RegexOptions.Multiline);
+        readonly Regex voteRegex = new Regex(@"^(\s|\[/?[ibu]\]|\[color[^]]+\])*-*\[[xX]\].*", RegexOptions.Multiline);
         // A voter referral is a user name on a vote line, possibly starting with 'Plan'.
-        Regex voterRegex = new Regex(@"^\s*-*\[[xX]\]\s*([pP][lL][aA][nN]\s*)?(?<name>.*?)[.]?\s*$");
+        readonly Regex voterRegex = new Regex(@"^\s*-*\[[xX]\]\s*([pP][lL][aA][nN]\s*)?(?<name>.*?)[.]?\s*$");
         // Clean extraneous information from a vote in order to compare with other votes.
-        Regex cleanRegex = new Regex(@"(\[/?[ibu]\]|\[color[^]]+\]|\[/color\]|\s|\.)");
+        readonly Regex cleanRegex = new Regex(@"(\[/?[ibu]\]|\[color[^]]+\]|\[/color\]|\s|\.)");
         // Clean extraneous information from a vote line in order to compare with other votes.
-        Regex cleanLinePartRegex = new Regex(@"(^-+|\[/?[ibu]\]|\[color[^]]+\]|\[/color\]|\s|\.)");
+        readonly Regex cleanLinePartRegex = new Regex(@"(^-+|\[/?[ibu]\]|\[color[^]]+\]|\[/color\]|\s|\.)");
         // Strip BBCode formatting from a vote line.  Use with Replace().
-        Regex stripFormattingRegex = new Regex(@"\[/?[ibu]\]|\[/?color[^]]*\]");
+        readonly Regex stripFormattingRegex = new Regex(@"\[/?[ibu]\]|\[/?color[^]]*\]");
 
-        List<string> formattingTags = new List<string>() { "color", "b", "i", "u" };
-        Dictionary<string, Regex> rxStart = new Dictionary<string, Regex>();
-        Dictionary<string, Regex> rxEnd = new Dictionary<string, Regex>();
+        readonly List<string> formattingTags = new List<string>() { "color", "b", "i", "u" };
+        readonly Dictionary<string, Regex> rxStart = new Dictionary<string, Regex>();
+        readonly Dictionary<string, Regex> rxEnd = new Dictionary<string, Regex>();
 
-        Dictionary<string, string> cleanVoteLookup = new Dictionary<string, string>();
+        readonly Dictionary<string, string> cleanVoteLookup = new Dictionary<string, string>();
 
 
         /// <summary>

NetTally/WebPageProvider.cs

@@ -19,8 +19,8 @@ public WebPageProvider(IForumData forumData)
             this.forumData = forumData;
         }
 
-        Dictionary<string, CachedPage> pageCache = new Dictionary<string, CachedPage>();
-        Dictionary<string, int> lastPageLoadedFor = new Dictionary<string, int>();
+        readonly Dictionary<string, CachedPage> pageCache = new Dictionary<string, CachedPage>();
+        readonly Dictionary<string, int> lastPageLoadedFor = new Dictionary<string, int>();
 
         #region Event handlers
         public event EventHandler<MessageEventArgs> StatusChanged;